The Sciences

The genetics of hair texture: a mystery

Gene ExpressionBy Razib KhanOct 2, 2011 11:34 PM
Main article image


Sign up for our email newsletter for the latest science news

I received an email today from a friend about speculation on the genetics of hair texture. More specifically, curly vs. straight hair. I know that there are a few SNPs which are correlated with straight vs. curly hair (23andMe has actually been involved in this), but the architecture hasn't been elucidated to nearly the same extent as pigmentation. The hair form markers explain ~5% of the population level variation. In contrast variants at large effect pigmentation genes can explain ~30% of population level variation.

So I did what I often do: check Wikipedia. Wikipedia might not be right much of the time, but it's a great place to start looking for sources and get a sense of the range of disagreement. What I found was not pretty. Basically there's not much there, and I was tempted to delete the whole section. The evolutionary explanations for why some populations have curly (or woolly) or straight hair are particularly embarrassing. But honestly I can't think of anything that's not laughable. Can you?

1 free article left
Want More? Get unlimited access for as low as $1.99/month

Already a subscriber?

Register or Log In

1 free articleSubscribe
Discover Magazine Logo
Want more?

Keep reading for as low as $1.99!


Already a subscriber?

Register or Log In

More From Discover
Recommendations From Our Store
Shop Now
Stay Curious
Our List

Sign up for our weekly science updates.

To The Magazine

Save up to 70% off the cover price when you subscribe to Discover magazine.

Copyright © 2022 Kalmbach Media Co.